pedestrian geek (powerpoint problem)

Help!!!
Suddenly yesterday I am unable to open one (only one) of my saved power point presentations. Is there something very elementary that is causing this? Every other file opens without difficulty and this one used to open fine (until yesterday).
Anyone have a suggestion?
Thnx,
dicarlo

What does your topic (until I added the powerpoint thing) have to do with your problem at all? You also posted in the wrong forum for it, I fixed that too. If you are going to continue to post here, please follow the guidelines outlined in the link I have in my signature.